import org.junit.Test;

/**
 * @program: changgou_parent
 * @author: zhanzhewan
 * @create: 2020-03-23 09:15
 **/
public class teststr {


    @Test
    public void test(){
        String a = "asaswqer";
        System.out.println(a.lastIndexOf('r'));
    }
}
